also: フォーマルウエア
formal wear; formal attire
Refers to clothing suitable for formal occasions such as ceremonies, parties, or business events. A straightforward loanword from English.
結婚式にはフォーマルウェアを着て行きます。
I will wear formal wear to the wedding.
このレストランではフォーマルウェアが求められます。
Formal attire is required at this restaurant.